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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Being angry, singing fast? Signalling of aggressive motivation by syllable rate in a songbird with slow song
 JAŠKA, Pavel
In this study, we focused on the role of syllable rate in territorial interaction of chiffchaff males. We confronted each tested male with one of three playback types which differed in song rate (slow, non-manipulated, fast). The behaviour and the song of each subject were recorded before, during and after the treatment. Males that attacked the loudspeaker during playback sang faster before the stimulation. When birds continued singing during playback they increased syllable rate when exposed to fast or non-manipulated song. Our results indicate that syllable rate could be a signal of aggression in chiffchaff and play a role as a conventional signal rather than a handicap signal.
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Song as a signal of competitive ability and motivation in Chiffchaff
 JAŠKA, Pavel
The basic aim of the thesis was testing the role of song length and syllable rate in male {--} male interactions in chiffchaff (Phylloscopus collybita). I looked for correlations between morphological measurements and vocal characteristics. I also presented stimuli manipulated in length and syllable rate to the chiffchaff males in the field playback experiments.
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